Let $f ( x , y ) = x ^ { 2 } + 2 x y + y ^ { 2 }$

question 37

Multiple Choice

Let $f ( x , y ) = x ^ { 2 } + 2 x y + y ^ { 2 }$ . If $x = 2$ , find $f ( x , 2 x )$ .

• A)12
• B)16
• C)24
• D)28
• E)32
• F)36
• G)42
• H)48

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